Thank you for your great work! Techguns is awesome.

Therefore, I prepared a translation into Russian:
https://pastebin.com/Gnd24FjM
File name: ru_ru.lang
Encoding: UTF8 w/o BOM

Please add this file to a new release. Thank you.

Seems fine, I will add the file to the mod.

Updated ru_ru transtaion:
https://pastebin.com/eg8QaVY3

Several lines are missing in en_us.lang:
tile.techguns.sand_hard.0.name=Hard Sand
tile.techguns.slimy.0.name=Slimy Sand
tile.techguns.concrete.5.name=Concrete (Reinforced)
tile.techguns.stairs_concrete.7.name=Concrete Stairs (Light)
tile.techguns.stairs_concrete.15.name=Concrete Stairs (Dark)

Also, some definitions in the descriptions of items can not be translated:
Ammo
Face
Back
Hands
Reloads with:
default
pickaxe
wrench
Power:
PowerType: RF
PowerType: Steam

I updated ru_ru.lang to your changes. I will look for missing translation keys in the item tooltips.

Отличная работа! Протестирую как буду новый модпак собирать.

Updated ru_ru transtaion:
https://pastebin.com/AdGprVnY

Several problems with translation:

1. Line does not work: techguns.radresistance
2. Duplicated lines:
   item.techguns.item_door3x3.name
   techguns.item.t2_combat.camoname.0
   techguns.item.t2_combat.camoname.1
   techguns.item.t2_combat.camoname.2
   techguns.item.t2_combat.camoname.3
   techguns.item.t2_combat.camoname.4
   techguns.item.t2_combat.camoname.5
   techguns.item.t2_combat_helmet.name
   techguns.item.t2_combat_chestplate.name
   techguns.item.t2_combat_leggings.name
   techguns.item.t2_combat_boots.name
   techguns.item.t2_commando_helmet.name
   techguns.item.t2_commando_chestplate.name
   techguns.item.t2_commando_leggings.name
   techguns.item.t2_commando_boots.name

Updated ru_ru transtaion:
https://pastebin.com/993dKjAS

Updated ru_ru transtaion:
https://pastebin.com/vVm5AUzx

thx, I updated my local file, will be in the next released version.